package main

import "fmt"

func Array() {
	a1 := [3]int{1, 2, 3}
	fmt.Printf("a1: %v,len =%d,cap =%d", a1, len(a1), cap(a1))

}
func SumInt64(vals []int64) int64 {
	var res int64
	for _, v := range vals {
		res += v
	}
	return res
}
